ELASTIC CONSTANTS OF ROCKS. 
Plate Glass. 
No. . . 
a 
b 
C 
d 
e 
/ 
9 
Size... 
.9855X1 .0205 
.9865X1.0055 
.981X1.0135 
1.016X1.008 
1.0215X.9955 
1.022X1.002 
5 1.025X.994 
Area . . 
1.0057 
.992 
.994 
1.024 
1 .017 
1.024 
1.016 
10,350,000 
10,950,000 
10,480,000 
10,380,000 
10,450,000 
10,380,000 
10,450,000 
E.. ... 
10,590,000 
10.500,000 
10,350,000 
10,380,000 
10,930,000 
10,600,000 
10,230,000 
.2281 
.236 
.226 
.233 
.221 
.229 
.216 
<r .... 
.228 
.2341 
.235 
.227 
.23 
.225 
.215 
6,370,000 
6,930,000 
6,460,000 
6,480,000 
6,380,000 
6,370,000 
6,140,000 
D 
6,480,000 
6,580,000 
6,520,000 
6,350,000 
6,760,000 
6,430,000 
6,020,000 
4,220,000 
4,440,000 
4,280,000 
4,210,000 
4,280,000 
4,220,000 
4,300,000 
C 
4,310,000 
4,250 000 
4,190,000 
4,230,000 
4,440,000 
4,330,000 
4,360,000 
LONGITUDINAL COMPRESSION MULTIPLY READINGS BY 4 FOR MILLIONTHS. 
Load (in 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
Side 
pounds). 
U. 
P. 
U. 
P. 
U. 
P. 
U. 
P. 
U. 
P. 
U. 
P. 
U. 
P. 
1,000 

O 
O 
O 
O 
O 








2,000 
30 
30 
25 
30 
30 
30 
30 
30 
30 
30 
28 
25 
30 
30 
3,000 
60 
55 
55 
60 
60 
60 
60 
60 
60 
55 
55 
55 
60 
60 
4,000 
90 
85 
85 
90 
90 
90 
90 
90 
90 
85 
85 
85 
85 
90 
5,000 
1 2O 
"5 
H5 
1 2O 
1 2O 
I 2O 
1 2O 
H5 
H5 
no 
H5 
no 
H5 
125 
6,000 
145 
145 
145 
145 
150 
150 
150 
145 
145 
135 
145 
140 
145 
145 
7,000 
175 
175 
i75 
175 
1 80 
1 80 
1 80 
175 
175 
170 
175 
170 
1 80 
175 
8,000 
210 
205 
205 
210 
210 
210 
205 
205 
20 5 
195 
200 
195 
205 
2IO 
9,000 
240 
235 
230 
240 
240 
243 
235 
235 
235 
225 
235 
230 
235 
2 4 
8,000 
210 
205 
205 
2IO 
2IO 
210 
205 
205 
205 
195 
205 
195 
205 
210 
7,000 
1 80 
1 80 
175 
1 80 
1 80 
I 80 
1 80 
175 
175 
170 
175 
170 
175 
1 80 
6,000 
150 
H5 
145 
150 
150 
155 
150 
145 
145 
135 
145 
140 
H5 
150 
5,000 
I 2O 
"5 
"5 
I 2O 
120 
I 2O 
1 2O 
H5 
H5 
I IO 
H5 
TI5 
"5 
I 2O 
4,000 
90 
85 
85 
9 
9 
90 
90 
90 
85 
85 
8 5 
, 85 
85 
90 
3,000 
60 
55 
55 
60 
60 
60 
60 
55 
55 
60 
60 
60 
60 
60 
2,000 
30 
30 
25 
30 
30 
30 
30 
30 
30 
30 
30 
30 
30 
30 
1,000 














LATERAL EXTENSION MILLIONTHS. 
I,OOO 
o 
o 
o 
O 








O 
O 
2,000 
22 
22 
21 
22 
19 
22 
20 
19 
19 
19 
20 
19 
21 
20 
3,000 
44 
45 
42 
45 
38 
4 6 
4 2 
39 
39 
40 
41 
39 
42 
42 
4 ooo 
68 
68 
66 
68 
60 
6 9 
63 
60 
60 
59 
65 
60 
60 
62 
5,000 
89 
89 
88 
89 
81 
92 
86 
Si 
82 
80 
8 9 
79 
80 
83 
6,000 
in 
in 
109 
in 
103 
H5 
112 
105 
IO2 
IOO 
IO9 
IOO 
IOO 
103 
7,000 
132 
133 
129 
133 
124 
138 
134 
126 
I2 4 
122 
I 3 
122 
122 
122 
8,000 
153 
156 
151 
156 
149 
1 60 
157 
148 
145 
143 
155 
145 
144 
144 
9,000 
173 
175 
172 
179 
170 
1 80 
I 7 8 
169 
169 
165 
I 7 6 
165 
I6 7 
165 
8,000 
155 
155 
152 
157 
149 
I6 3 
159 
149 
149 
145 
155 
147 
149 
147 
7,000 
135 
133 
130 
135 
125 
I4O 
135 
129 
126 
125 
130 
125 
125 
125 
6,000 
"S 
112 
no 
H5 
103 
H5 
IOO 
1 06 
105 
105 
112 
105 
103 
1 06 
5,000 
93 
90 
90 
90 
80 
90 
89 
85 
88 
88 
90 
85 
82 
8 9 
4,000 
70 
71 
70 
70 
60 
65 
64 
62 
62 
62 
6 9 
65 
62 
69 
3,000 
49 
45 
45 
50 
40 
42 
40 
42 
4i 
4i 
45 
43 
42 
49 
2,000 
22 
23 
22 
25 
21 
2O 
20 
21 
21 
21 
22 
22 
22 
28 
1,000 



o 
O 
O 

O 






